Patterns Of Reactivity Topic 4 Flashcards by Izziexxxfrogz 🐸🥑 | Brainscape

Q

If a metal reacts with oxygen we make a

A

Metal oxide

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Q

How are the reactions similar with metals + water

A

Reacts vigorously to
Gives of gas
Move across surface
Metal disappears

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Q

How do the reactions differ

A

Potassium catches fire and burns with lilac flame. Sodium and potassium react more quickly than lithium

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Q

What safety precautions need to be taken when handling very reactive metals to water

A

Metals MUST be stored in oil
Safety glasses
Safety screen

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Q

The alkaline solutions formed as the group 1 metals react with water are called

A

Hydroxides

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Q

What’s the equation for metal + water

A

Metal + water -> metal hydroxide + hydrogen

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Q

What is produced when metals react with water

A

Metal hydroxide + hydrogen

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Q

What is usually produced when a metal reacts with an acid?(mash)

A

Hydrogen gas + slat (squeaky pop test)

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Q

What metals would you not put in acid

A

Potassium sodium and lithium as it’s explosive

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Q

Why does aluminium resist corrosion

A

Aluminium resists corrosion as it forms a protective oxide layer on its surface and this protects the aluminium

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Q

What’s a displacement reaction

A

A more reactive metal will displace a less reactive metal from its compound. This reaction is observed by colour changes or fizzing or heat being involved

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Q

Oder of relativity

A

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Zinc
Iron
Tin
Lead
Copper
Silver
Gold

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Q

What is mnemonic to remember the order of reactivity

A

Please
Send
Little
Charlie’s
Monkeys
And
Zebras
In
Tall
Lead
Cages
Securely
Guarded

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Q

Chemical name for rust

A

Hydrated iron (III) oxide

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Q

Two conditions needed for rusting

A

Oxygen + water

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Q

Painting or oiling (rust prevention)

A

Oiling stops from moisture and oxygen accessing the metal. Same for painting. The cheapest option

Q

Plastic coating (rust prevention)

A

Prevents oxygen and moisture reaching iron

Q

Galvanising (rust prevention)

A

When iron objects are coated with a more reactive metal such as zinc or chromium

Q

Sacrificial protection (rust prevention)

A

The more reactive metal oxidises more readily than iron, so it ‘sacrifices’ itself while the iron does not rust.